Speed controller for toy vehicles

ABSTRACT

The invention relates to a speed controller ( 10 ) for toy vehicles on a car racetrack, particularly on a track-guided car racetrack. According to the invention, the speed controller ( 10 ) has a manually operable device ( 12 ) for varying an electrical driving voltage from an electric power supply ( 20 ) for the car racetrack, and the device ( 12 ) for varying the electrical driving voltage can be manually displaced over a preset operating path. To this end, the device ( 12 ) for varying the electrical driving voltage is designed whereby it varies the driving voltage, which is output by the electric power supply ( 20 ), over the operating path from zero to a first preset maximum value below the voltage that is output by the electric power supply ( 20 ). An operating device ( 16 ) is additionally provided which is designed whereby, in the event of a manual operation, it sets the driving voltage, which is applied to the car racetrack, to a second preset value above the maximum driving voltage that is output by the device ( 12 ) provided for varying the electrical driving voltage.

[0001] The invention relates to a speed controller for toy vehicles on a car racetrack according to the preamble of Claim 1.

[0002] The goal, for example, of track-guided car racetracks is to manually guide a toy vehicle during a race as fast as possible along the track while controlling the driving speed and preventing the toy vehicle from undesirably leaving the racetrack; that is, jumping the track. Conventionally, an electric motor is provided as the drive of the toy vehicle, the drive shaft protruding at one end of the motor and ending in a transmission. In this case, a pinion is arranged at the transmission-side end of the drive shaft. The joint axle of the driven wheels, which carries a crown wheel, also extends through the transmission. In the transmission, the pinion and the crown wheel intermesh, a different number of teeth of the pinion and of the crown wheel causing a corresponding transmission ratio. The motor receives a driving or running voltage from corresponding conductor rails on the car racetrack. This driving or running voltage is varied by a player by means of a manual controller or a manually operable speed controller, so that the player moves the toy vehicle over the car racetrack. However, in this case, the player has to pay close attention to increasing the driving voltage not to such an extent mainly in front of curves and in curves that the toy vehicle jumps the track because of excessive speed. Frequently, it is not possible on 90% or more of the racetrack route to move the toy vehicle at a maximal running voltage, that is, at a maximal speed. A corresponding range of the dynamics of the manual controller is therefore lost. On the other hand, there are racetrack sections, such as loopings, on which a high speed is required for a short time and in a rapid manner, so that the toy vehicle does not fall out of the track.

[0003] It is an object of the present invention to improve a manually operable speed controller of the above-mentioned type such that toy vehicles can be moved better and more comfortably along a car racetrack. In particular, it should become possible for inexperienced operators to provide a rapid successful event when operating toy vehicles; that is, also inexperienced operators should rapidly be capable of successively driving several complete racetrack rounds while preventing the vehicle from jumping the track because of an excessive speed. On the whole, the subjective vehicle handling of toy vehicles is to be improved by way of a corresponding optimization of the manual or speed controller.

[0004] This object is achieved by means of a speed controller of the above-mentioned type having the features characterized in Claim 1. Advantageous further developments are indicated in the additional claims.

[0005] For this purpose, it is provided according to the invention that the device for varying the electric driving voltage is constructed such that this driving voltage supplied by the electric power supply varies along the operating path from zero to a first preset maximal value below the voltage supplied by the electric power supply, and that an additional operating device is provided which is constructed such that the latter, during the manual operation, sets the driving voltage on the car racetrack to a second preset value above the driving voltage maximally supplied by the device for varying the electric driving voltage.

[0006] This has the advantage that, during the operation of the game, by operating the device for varying the electric driving voltage, an optimal adaptation to the route will be possible in such a manner that a fast driving is avoided in curves, so that the toy vehicle can be driven along the route more easily and with a reduced risk of jumping the track. On the other hand, the additional operating device makes it possible to provide the toy vehicle with a sufficient momentum in special situations, as, for example, before a looping, on a straight line for passing, or in front of a car jump device. The vehicle handling of the toy vehicle with respect to the manually operable speed controller is improved because the voltage range of the driving voltage varied by means of the operating path of the speed controller can be adapted correspondingly.

[0007] For example, the second preset value corresponds to the voltage output of the electric power supply.

[0008] For a particularly effective acceleration, the second preset value corresponds to a higher voltage than the voltage output of the electric power supply.

[0009] For the at least short-term increase of the driving voltage to a value above the voltage output of the electric power supply, an energy accumulator, particularly a capacitor or a battery, is provided which is constructed and arranged such that, when the additional operating device is manually operated, this energy accumulator supplies power to the car racetrack in addition to the electric power supply.

[0010] For a simple and fast manual operation, the additional operating device is arranged at a housing of the speed controller and is constructed, for example, as an electronically or mechanically acting pushbutton or switch.

[0011] For a rapid and immediate acceleration of the toy vehicle, the additional operating device is constructed such that, when manually operated, the latter sets the driving voltage at the car racetrack to the value of the voltage output of the electric power supply independently of the position of the device for varying the electric driving voltage.

[0012] For example, the device for varying the electric driving voltage transmits maximally 60% to 90%, particularly 65%, 70%, 75%, 80% or 85%, of the output voltage of the electric power supply as driving voltage to the car racetrack.

[0013] In a particularly preferred embodiment, the device for varying the electric driving voltage comprises an adjusting push rod which operates a variable resistor, particularly a switching resistor, in which case at least one multiplier resistor is looped into the connection between the electric power supply, the variable resistor and the conductor rail of the car racetrack. In this case, the additional operating device is preferably constructed and arranged such that it electrically bridges the variable resistor and the multiplier resistor. Optionally, the additional operating device is constructed and arranged such that it electrically connects an output of the electric power supply directly with corresponding conductor rails on the car racetrack.

[0014] In the following, the invention will be explained in detail by means of the drawing.

[0015]FIG. 1 is a schematic electric circuit diagram of a preferred embodiment of a speed controller according to the invention; and

[0016]FIG. 2 is a perspective view of a preferred embodiment of a speed controller according to the invention.

[0017] The preferred embodiment of a speed controller 10 according to the invention illustrated in FIG. 1 comprises a variable resistor 12, a multiplier resistor 14 with a fixed resistance value, a switch 16 and a filter capacitor 18. The latter can also be arranged outside the speed controller 10 directly on a car racetrack, which is not shown. An adjusting push rod, which is not shown in FIG. 1 and which changes the resistance value of the variable resistor 12 depending on the position of the adjusting push rod, acts upon the variable resistor 12. For this purpose, the adjusting push rod is disposed to be manually displaceable, for example, by means of a player's thumb, along a predetermined operating path.

[0018] For supplying power, a transformer 20 is provided which has two voltage outputs 22, 24. One voltage output 22 and 24 respectively is connected with a speed controller 10. A first pole 26 of the voltage outputs 22, 24 is directly looped through and is connected with a first conductor rail 28 on the car racetrack. A second pole 30 of the voltage outputs 22, 24 is connected with the variable resistor 12. The latter is, in turn, connected by way of the multiplier resistor 14 with a corresponding second conductor rail 32 of the car racetrack. The filter capacitor 18 mutually connects one pair of conductor rails 28, 32 respectively and, as a result, short-circuits high-frequency fractions of the supply voltage. According to the position of the adjusting push rod, the speed controller 10 therefore feeds a variable driving voltage, which is derived from the output voltage of the transformer 20, to the conductor rails 28, 32 of the car race track, which leads to correspondingly different speeds of the toy vehicle moving along this pair of rails 28, 32. However, as a result of the multiplier resistor 14, the maximal driving voltage is limited to a first preset value below the output voltage of the transformer 20. This correspondingly limits the maximal speed of the toy vehicle on the car racetrack.

[0019] In addition, the switch 16 is connected such that, when the switch 16 is manually operated, the variable resistor 12 and the multiplier resistor 14 are bridged, so that the complete output voltage of the transformer 20 is applied directly to the conductor rails 28, 32 as the driving voltage. Thus, while the variable resistor 12, even in the case of a maximal deflection, provides only a limited driving voltage below the output voltage of the transformer 20, for example, only 70% or 75% of the output voltage of the transformer 20, the switch 16 provides a type of “boost function” or “turbo function”, by which the toy vehicle can be accelerated by means of 100% driving voltage to the maximal speed. In this case, the electrical arrangement is made such that this boost function, when the switch 16 is operated, independently of the position of the adjusting push rod, provides 100% driving voltage or maximal speed for the toy vehicle.

[0020] In a further development, which is not shown, additionally, an energy accumulator, such as a capacitor or a battery, is provided, by means of which, when the switch 16 is operated for the boost function, energy can additionally be fed to the transformer. It is thereby possible to, at least for a short time, raise the driving voltage above the output voltage of the transformer 20, so that a correspondingly higher acceleration of the toy vehicle occurs.

[0021]FIG. 1 illustrates two speed controllers 10 for a car racetrack with two driving tracks. Here, two players can drive a race against one another. In a concrete embodiment, the transformer 20 has an output voltage of 14.8V and the multiplier resistor has a resistance value of 33 Ohm at 3 W maximal electric power.

[0022]FIG. 2 illustrates an example of a structural shape of a speed controller 10 with the adjusting push rod 34 and the switch 16. A housing 36 of the speed controller 10 is constructed so that a user's hand can reach around it. The adjusting push rod 34 can be operated by means of the thumb of the corresponding hand which reaches around. The switch 16 is arranged such on the housing 36 that it can be operated by means of the index finger of the hand reaching around. 

1. Speed controller (10) for toy vehicles on a car racetrack, particularly a track-guided car racetrack, the speed controller (10) having a manually operable device (12, 34) for varying an electric driving voltage from an electric power supply (20) for the car racetrack, and the device (12, 34) for varying the electric driving voltage can be moved manually along a predetermined operating path, characterized in that the device (12, 34) for varying the electric driving voltage is constructed such that the latter varies the driving voltage supplied by the electric power supply (20) along the operating path from zero to a first predetermined maximal value below the voltage supplied by the electric power supply (20), and in that an additional operating device (16) is provided which is constructed such that, when manually operated, the latter sets the driving voltage at the car racetrack to a second predetermined value above the driving voltage maximally supplied by the device (12, 34) for varying the electric driving voltage.
 2. Speed controller (10) according to claim 1, characterized in that the second predetermined value corresponds to the voltage output of the electric power supply (20).
 3. Speed controller (10) according to claim 1 or 2, characterized in that the second predetermined value corresponds to a higher voltage than the voltage output of the electric power supply (20).
 4. Speed controller (10) according to at least one of the preceding claims, characterized in that an energy accumulator, particularly a capacitor or a battery, is provided which is constructed and arranged such that, during the manual operation of the additional operating device (16), this energy accumulator supplies power to the car racetrack in addition to the electric power supply (20).
 5. Speed controller (10) according to at least one of the preceding claims, characterized in that the additional operating device (16) is arranged at a housing (36) of the speed controller (10).
 6. Speed controller (10) according to at least one of the preceding claims, characterized in that the additional operating device (16) is constructed such that, when manually operated, the latter sets the driving voltage at the car racetrack to the value of the voltage output of the electric power supply (20) independently of the position of the device (12, 34) for varying the electric driving voltage.
 7. Speed controller (10) according to at least one of the preceding claims, characterized in that the device (12, 34) for varying the electric driving voltage transmits maximally 60% to 90%, particularly 70%, 75% or 80%, of the output voltage of the electric power supply (20) as driving voltage to the car racetrack.
 8. Speed controller (10) according to at least one of the preceding claims, characterized in that the additional operating device (16) is constructed as an electronically or mechanically acting pushbutton or switch.
 9. Speed controller (10) according to at least one of the preceding claims, characterized in that the device (12, 34) for varying the electric driving voltage comprises an adjusting push rod (34) which operates a variable resistor (12), particularly a switching resistor, at least one multiplier resistor (14) being looped into the connection between the electric power supply (20), the variable resistor (12) and the conductor rail (28, 32) of the car racetrack.
 10. Speed controller (10) according to claim 9, characterized in that the additional operating device (16) is constructed and arranged such that it electrically bridges the variable resistor (12) and the multiplier resistor (14).
 11. Speed controller (10) according to claim 9, characterized in that the additional operating device (16) is constructed and arranged such that it electrically connects an output (22, 24) of the electric power supply (20) directly with corresponding conductor rails (28, 32) on the car racetrack. 